If a baby gets a respiratory illness, formula may cause even more mucus. (notmilk.com)
Members of the Clostridiales group may get a boost when worms are around, he says, because the intestines produce more mucus, which the bacteria feast on. (sciencemag.org)
Your body makes more mucus when an egg starts to ripen, before ovulation is about to happen. (plannedparenthood.org)